1. Department of Mathematics, Padima Janakalyan Banipith, Kukrakhupi, India
2. School of Mathematics and Statistics, Southwest University, Chongqing, People's Republic of China
3. Faculty of Civil Engineering, Slovak University of Technology, Bratislava, Slovakia
4. Fac Sci, Dept Algebra & Geometry, Palacky Univ Olomouc, Olomouc, Czech Republic
5. Machine Intelligence Institute, Iona College, New Rochelle, NY, USA
6. Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
7. Dept. of Mathematics, Techno College of Engineering Agartala, Agartala, Tripura, India